Apparatus for purifying or washing air or other gas, or for cooling a liquid



June 14, 1938. DRUMMOND 2,120,490

, APPARATUS FOR'PURIFYING OR WASHING AIR OR OTHER GAS, OR FOR COOLING A LIQUID,

Filed Oct. 10- 1936 15 engine.

, Fig. 4 is a view of a modification.

Patented June 14, 1938 UNITED STATES PATENT oF Fic APPARATUS FOR PUBIFYING OR WASHING AIR OR OTHER GAS, OR FOR COOLING A noun) Roy Macgregor Drummond, London, England Application October 10, 1936, Serial No. 105,134 In Great Britain October 29, 1935 50laims.

The present invention'relates to apparatus for air or other gas or for cool- The method consists in its simplest form" in the creation of a wave in a liquid-containing vessel and in the conversion of the crest of such 1 wave into a spray through which the gas to be 'aopurified or the liquid to be cooled is caused to one or more baille plates, which are preferably :curved, and which extend downwardly from the '25 upper part of the liquid-containing vessel, the

lower edge or edges of the baflle or bames being at a small distance above the liquid level. tering air or other gas impinges against a baffle and is directed downwardly into contact with 30 the liquid so that a trough is formed on one side of the baille and -a wave on the other. As the baille does not extend downwardly to the liquid level the gas travels forward beneath the baille and encountersthe crest of the wave, sweeping .35 from this crest a substantial volume of spray which extracts cools it.- v r I In the case of a liquid to be cooled air acts as a cooling agent, the air being admitted at one end 6 and evacuated at the other end above the liquid.

The lower end 01' the'baflle is in this case preferably in the form of a flap to facilitate regulation of the flow.

*One form of construction or the invention as applied to an air purifier for use in connection with an internal combustionengine is illustrated in the annexed drawing, in which:-

Fig. l is an elevation.

3 is a section on the line 3-3 Fig.. "1'.

:In the; drawing,- a is' an inlet chamber into which. air'i'rom the atmosphere enters through 5 holes b. and strikes against the downwardly ex 3. In apparatus of the class described, a ves- In this latter capacity the invention is Means for creating the desired wave consist of The enimpurities from the gas and also Fig. 2 is a section on theline' 2-2 of Fig. 1, 50 and ,7

tending baille c a curved lower end. 0'. The lower partof chamber contains oil, but

the lower part-c oi'the-baille does not come into contact with this oil The suction of. the engine draws the air beneath-this baille, and a trough dis formed in the oili on one side of the baflle and a crest e on the other side of the baflle. The

air drivesa fine spray-{from the crest e which mingles with and absorbs the dust and grit in the -air. This spray impinges against a curved scrubber gauze f which' jr'emoves the last traces of grit from the The grit and other impurities form a residue 9 at the bottom of the chamber-a from which they can be removed by withdrawal' of a plug h. Any atomized oil remaining in the air is removed by contact with an eliminator 7' whichis in the form of a casing'containing a plurality of superposed metal plates is arranged in zig-zag fashion, as shown in Fig. 2. This 011 falls down throughv an aperture linto ing chamber being open to vacuum through the a compensating chamber m. This compensat-' aperture 1 causes the level of the oil in this chamber m'to rise or fall with consequent adjustment 'quired depth oi-air-stream under'the baille.

Mechanical means in the form of a rocker arm which raises or lowers the heme may be provided as shown in Fig. 4 in which theiower end of the ba'ille is in the form of a flap.

' Having thus describedthe nature ofthe said invention and the best means I know of carrying let section, and a body of liquid in said chamber,

said baiile being curved at its lower portion to- .ward the inlet section, the curve of the bailie being such that the lower edge of the baflieis spaced above the liquid and that the air upon passing beneath said edge strikes the curved portion substantiallytangentially to the curve, thereby producing an upward current'of air in said outlet section and an aspirating effect causing the air to exert a force on the liquid at said curved bafform, and against which the spray impinges with i'emoval of impurities.

sel providing a main chamber. a baflle extendin; between the sidewalls thereof and dividing the chamber into an air inlet section and an air outlet section, and a body of liquid in said chamber, said baille being curved at its lower portion toward the inlet section, the curve oi the baiile being such that the lower edge of the baiiie is spaced above the liquid and that the air upon passing beneath said edge strikes the curved portion substantially tangentially to the curve, thereby producing an upward current of air in said outlet section and an aspirating eflect causing the air to exert a force on the liquid at said curved baiile and creating a wave of the con-' tained liquid from-the crest of which a spray will be thrown oil, and means for regulating the passage for air between the baile and the liquid. 

